The Rosetta Project is a global collaboration of language specialists and native speakers working to build a publicly accessible digital library of material on the nearly 7,000 known human languages. The collection currently contains nearly 100,000 pages of material documenting over 2,500 languages, as well as a growing multimedia collection of modern and historical language recordings.
The Rosetta Project is one exploration of The Long Now Foundation's 10,000 Year Library. The Rosetta Disk, a very long-term backup of the collection, is a hand-sized nickel disk microscopically etched with thousands of pages from the collection and readable with 600 power optical magnification. The writing on the disk can last and be legible for thousands of years.
The Rosetta Project website has more information on the Rosetta Digital collection and Rosetta Disk
The Long Now Foundation website has more information on the 10,000 Year Library